17-aminoandrostanes



3,097,200 17-AM1NOANDROSTANES Fred A. Kincl, Mexico City, Mexico, assignor, by mesne assignments, to Syntex Corporation, a corporation of Panama Filed Jan. 3, 1962, Ser. No. 164,184

No Drawing.

14 Claims. (Cl. 260-2395) The present invention relates to novel cycl-opentanophenanthrene derivatives and to a process for the production thereof.

More particularly the present invention relates to novel NB-amino androstane derivatives. 1

The novel compounds of the present invention which inhibit the function of the pituitary gland without having marked androgenic or toxic properties are represented by the following formulas:

O m an no In the above formulas Y may be a double bond or a saturated linkage between C-4 and C-5; Z represents a double bond or a saturated linkage :between C-5 and C-6; R represents hydrogen or lower alkyl; R represents lower alkyl, or an aryl or aralkyl group of up to 10* carbon atoms and R and R together with the nitrogen atom represent a heterocyclic radical selected from the group consisting of pynrolidino,-piperidino, monpholino, piperazino and the like.

The novel compounds of the present invention are prepared by the method illustrated by the following equation:

; United States Patent 0 3,097,200 Patented July 9, 1963 In the above formulas R and R have the same meaning as hereinbefore set forth.

In practicing the process just outlined the starting A androsten 3/8-ol-l7-one (I) is treated with an amine, as for example pynrolidine, piperidi-ne, benZy-lmethylamine or diethylamine, in the presence of formic acid at a temperature Within the range of C. to 180 C. for a period of time of the order of 5 to 15 hours, thus afiording the corresponding 17fi4amino-A -androsten-3[Fol (II). Conventional hydrogenation of this compound with hydrogen in the presence of a suitable catalyst such as platinum oxide yields the corresponding 17 fi-aimino androstan-3fiol (IV).

Following a second sequence .of reactions the 173- amino-A -androsten-3fi-ol derivative (II) npon Oppenzauer oxidation gives the respective l7/3- amino-A androsten-S-one (III) which after treatment with an alkali metal such as lithium in liquid ammonia yields the corresponding 17fl-amino-androstan-3-one derivative (V).

"In particular 17fi-ethylamino-A androstans[3-01 may also be prepared from pregnenolone acetate as follows: the latter compound upon conventional treatment with hydroxylamine hydrochloride yields the corresponding 20- ketoxime; treatment of this oxime with a chloride of a sulfonic acid preferably p-acetamido-benzene sulfony-l chloride in a suitable solvent such as pyridine yields 17 3- N- acetoxy-amino-A -androsten-'3,o-ol-3 aoetate which upon reduction, preferably with lithium aluminum hydride, yields the desired ,17fl-ethylamino A -androsten-3B-ol.

The quaternary ammonium salts of the above described l7fi-amines are valuable derivatives which have a satisia-ctory solubility in water and may be administered by injection. These salts are prepared by conventional treatment of a 17,8-amine of the type defined above with an organic or inorganic acid, as for example, hydrochloric acid, sulfuric acid or oxalic acid, or a lower alkyl halide such as methyl iodide, ethyl bromide and the type conventionally employed in the therapeutic field.

The following specific examples serve to illustrate but are not intended to limit the scope of the present invention.

Example I A mixture of 25 g. of pregnenolone acetate, 30 cc. of pyridine, cc. of 95% ethanol and 8.5 g. of hydroxylamine hydrochloride was refluxed for 30 minutes and cooled in ice. The precipitate was collected, washed with hot water and dried, thus giving the ZO-ketoxime of the starting compound.

A solution of 24 g. of the oxime in 70 cc. of pyridine treated with 30 g. of p-acetamidobenzenesul-fonyl chloride in 7 0 cc. of pyridine and stirred for 2 hours at 10 C. and 2 hours at room temperature. The mixture was poured into ice-water, and the brown precipitate was extracted with chloroform, washed with water, dried and evaporated. Crystallization of the residue from methylene chloride-hexane (decanting first from a colored oil which separated) alforded 17BN-acetoxyamino-A androsten-Zaflol-B-acetate.

Example II A solution of 10 g. of the product of the preceding example in 500 cc. of tetrahydrofuran was added over a 30 minute period to a stirred suspension of 10 g. of lithium aluminum hydride in 500 cc. of anhydrous tetrahydrofuran. The mixture was refluxed for 2 hours, then cooled and cautiously treated with 50 cc. of ethyl acetate and 20 cc. of Water. Solid sodium sulfate was added, the inorganic material filtered oil and thoroughly washed with hot ethyl acetate, the combined organic solutions upon evaporation yielded a crude material, which was purified by crystallization from acetone-hexane thus giving 17/3-ethyllamino-A -androsten-35-01.

Example III A mixture of 1 g. of A -androsten-3fi-ol-17-one, 1 cc. of pyrrolidine and 1 cc; of formic acid was heated under a condenser at 170 C. for 12 hours. The reaction mixture was then cooled and treated with cc. of 3 N hydrochloric acid. 5T he formed amine hydrochloride was filtered off and washed with water and ether. The solid was treated with 25 cc. of a 10% aqueous potassium hydroxide solution and the resulting mixture was extracted with ether. The organic extract was washed with water, dried over anhydrous sodium sulfate and evaporated to dryness. Crystallization from acetonemethylene chloride afiorded 17,8- pyrrolidino-A -androsten-35-01.

Example IV Following exactly the technique described in the foregoing example exmpt that pyrrolid-ine was substituted by piperid-ine, there was obtained 17/i-piperidino-A -androsten-3fi-ol.

Example V Using exactly the same conditions described in Example III except that pyrrolidine was substituted by N-benzylmethylamine, there was obtained 17,8-(N-benzylmet-hylamino)-A -androsten-3B-o1.

Example VI Following the procedure described in Example III except that pyrrolidine was substituted by diethylamine and the reaction mixture was kept at 130 C. for 5 hours, there was obtained 17fl-diethylamino-A -androsten-3fl-ol.

Example VII Following the method described in Example 111 except that pyrrolidine was substituted by aniline there was obtained 17/3-N-phenylamino-A -androsten-3,8-o1.

Example VIII A solution of 1 g. of 175-ethylamino-A -androsten-3fl-ol in 80 cc. of toluene and 20 cc. of cyoloheX-anone was dried by distilling off 10 cc. of the solvent. A solution of 1 g. of aluminum isopropox-ide dissolved in 7 cc. of anhydrous toluene was then added and the mixture was refluxed for 45 minutes; 4 cc. of acetic acid were added and the solvents removed by steam distillation. The product was extracted several times with ethyl acetate and the organic extracts washed with 5% hydrochloric acid solution, water, 10% sodium carbonate solution and water until neutral, dried over anhydrous sodium sulfate and evaporated to dryness. Crystallization from acetone-hexane afforded 17fi-ethylamino-A -androsten-3-one.

Following the same procedure there were treated the starting compounds listed below, affording the corresponding products hereinafter indicated.

Starting Compound Product 17/3pyrrolidino-N-androsten-B-one. 17B-piperldino-A -androsten-3-one. 17;t3-N-loenzylmethylamino-A androsten-3-one. 175-diethylamino-N-androsten- 3-one. 17fl-Nphenylamino-A -androsten- 17fl-N-phenylarnino-Nandrostem 318-01. 3-one.

Example IX ether, washed with water, dried and the ether evaporated to afford a gum which was adsorbed from 100 cc. of benzene onto 50 1g. of alumina.

Elution with benzene-ether atatorded a product which upon recrystallization from acetone-hexane gave 17fi-ethylamino-androsten 3-one.

Following the same technique were treated the starting compounds under I thus affording the corresponding products under II.

Starting Compound Product 17B-pyrrolidino-A -androsten-3-one 17fl-piperidinO-A -androsten-30ne 17fl-N-benzylmethylamino-A androsten-Ii-one. 176-diethyIarnino-N-androsten- 17B-pyrrolidinO-androstan-3-0ne. 1id-piperidino-andr0stan-3-one. 17B-Nhenzy1methy1aminoandrostan-Ll-one. IT/S-diethylamino-androstan-3-one.

-one. 17/9-N-phenylan1iu0-A -androsten- 3-one.

Example X Starting Compound Product 17B-N-phenylamino-androstan- 17B-p yrrolidino-A -androsten-3B-ol- 17 8-p1peridino-Nandrosten-3B-ol 17B-N-benzylmethylaminomandrosten-SB-ol. 171S-diethy1amin0-A -androsten- I claim: 1. A compound of the following formula:

wherein Y is selected from the group consisting of a double bond and a saturated linkage between C4 and C5; R is a member of the group consisting of hydrogen and lower alkyl; R is selected from the group consisting of an aryl group and an aralkyl group, each containing up to 10 carbon atoms and R and R together with the nitrogen atom form a heterocyclic radical selected from the group consisting of pyrrolidino, piperidino, morpholino and piperazino.

. 17fi-pyrrolidino-A -androsten-3-one.

. 17fi-piperidino-A -androsten-3-one.

. 17/3-N-benzylmethylamino-A -androsten-3-one.

. 17fi-N-phenylamino-A -androsten-3-one.

. l7fi-pyrrolidino-androstan-3-one.

. 17/3-piperidino-androstan-3-one.

. A compound of the following formula:

ooqmutrswro 11. 17fl-N-benzylmethy1amino-A -androsten-313-01. 12. 17p-N-phenylamino-A -androsten-35-01.

13. 17,8-pyrrolidino-androstan-3fi-01.

14. 17,8-piperidino-androstanSfl-ol.

References Cited in the file of this patent UNITED STATES PATENTS 2,582,258 Julian et a1 Sept. 17, 1949 2,705,238 Julian et a1 Mar. 29, 1955 3,009,925 Babcock Nov. 21, 1961 

1. A COMPOUND OF THE FOLLOWING FORMULA: 